Important Note: Before starting any work on your vehicle, ensure it's parked on a level surface, the engine is off and cool, and you have the proper safety equipment (gloves, eye protection). Power steering fluid is under pressure, so be cautious.
Steps to address potential air in the power steering system of a 1999 Corvette:
1. Check Fluid Level: First and foremost, check your power steering fluid level in the reservoir. It should be between the minimum and maximum lines. If low, add the correct type of power steering fluid specified in your owner's manual (usually Dexron III or equivalent). Never overfill.
2. Inspect for Leaks: Carefully examine the power steering hoses, connections, and the pump itself for any leaks. A leak is the most common cause of air entering the system. Repair any leaks before proceeding.
3. Start the Engine and Turn the Steering Wheel: With the engine running, slowly turn the steering wheel all the way to the left, hold for a few seconds, then all the way to the right, hold for a few seconds. Repeat this process several times. Listen for any unusual noises.
4. Monitor Fluid Level: While performing step 3, keep an eye on the fluid level in the reservoir. If the level drops significantly, you likely have a leak.
5. Check for Bubbles: If you have access to a clear section of hose, you might see bubbles working their way out. This indicates air escaping the system.
6. Top Off Fluid (If Necessary): After turning the steering wheel several times, check the fluid level and top it off if needed.
If you've just replaced the power steering pump or rack and pinion:
* Some mechanics suggest a slightly different approach after a pump or rack replacement. They might loosen the fitting on the pressure line going to the rack and pinion (usually a banjo bolt) a *very* small amount while an assistant turns the steering wheel. You should see fluid flow, and when it becomes steady and free of bubbles, tighten the fitting. This is risky and should only be done by someone experienced with power steering systems. It's easy to strip the threads or damage the fitting.
When to Seek Professional Help:
If you've performed these steps and still have problems with your power steering (hard steering, noises, leaks), it's best to consult a qualified mechanic. There may be a more serious issue than just trapped air. Incorrectly bleeding the system can lead to damage to the power steering pump.
This procedure focuses on the most likely scenarios. A 1999 Corvette's power steering system is complex; attempting advanced procedures without experience is strongly discouraged.
